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Official data from INPI

LENTE RESISTENTE A ABRASAO

Em AnáliseInvention Patent

Application data

Number

PI7800371

Type

Invention Patent

Filing

01/24/1977

Publication

-

Progress at the INPI

  1. Filing01/24/77
  2. Publication
  3. Examination
  4. Allowance10/20/81
  5. Grant07/27/82
  6. Expired07/20/93

The letters patent expired on 07/20/1993: the term of protection has ended. The technology is in the public domain and may be freely used in Brazil.

Talk to a specialist

Latest action published by the INPI: 12/20/1983. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

AMERICAN OPTICAL CORP

See this company's full portfolio

Inventors

L. B. (pessoa física)

Technical data

IPC Classification

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Pedido de licença compulsória

#20.1

12/20/1983

RPI 687

20.10

12/06/1983

RPI 685

Pedido de licença compulsória

#20.1

10/18/1983

RPI 678

Licença compulsória (variante)

#20.2

07/26/1983

RPI 666

Concessão da patente

#16.1

07/27/1982

RPI 614

Notificação para pagamento de retribuição

#13.1

03/02/1982

RPI 593

Deferimento

#9.1

10/20/1981

RPI 574

Carta-patente expirada

#21.1

07/20/1993

RPI 1181

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